<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片区域 -->
    <el-card>
      <!-- 警告条区域 -->
      <el-alert title="添加商品信息" type="info" center show-icon :closable="false">
      </el-alert>
      <!-- 步骤条区域 -->
      <el-steps :space="200" :active="defaultActive-0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <!-- tab栏 -->
      <el-form :model="addForm" :rules="addFormrules" ref="addFormRef" label-width="100px" label-position="top">
        <el-tabs :before-leave="beforeTabLeave" v-model="defaultActive" :tab-position="'left'" @tab-click="tabClicked">
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader v-model="addForm.goods_cat" :options="goodsLIst" :props="goodsItem" @change="handleChange"></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item :label="item.attr_name" v-for="item in cateList" :key="item.attr_id">
              <!-- 多选框组 -->
              <el-checkbox-group v-model="item.attr_vals" v-for="(cb,i) in item.attr_vals" :key="i">
                <el-checkbox :label="cb" border size="mini"></el-checkbox>
              </el-checkbox-group>
            </el-form-item>

          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyParamsLIst" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- 上传图片 -->
            <el-upload :headers="objectTocken" :action="uploadURL" :on-preview="handlePreview" :on-remove="handleRemove" list-type="picture" :on-success="onSuccessUplod">
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器 -->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <!-- 添加商品按钮 -->
            <el-button type="primary" class="addgoods" @click="addCate">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <!-- 图片预览对话框 -->
    <el-dialog title="图片预览" :visible.sync="dialogVisible" width="50%">
      <img :src="previewURl" alt="" class="previewImg">
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
  data() {
    return {
      //默认激活项
      defaultActive: '0',
      // 添加商品表单数据对象 
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: [],
        // 图片上传的临时地址
        pics: [],
        // 商品介绍：富文本内容
        goods_introduce: '',
        // 添加商品
        attrs: []
      },
      // 添加商品表单校验规则
      addFormrules: {
        goods_name: [{ required: true, message: '请输入商品名称', trigger: 'blur' }],
        goods_price: [{ required: true, message: '请输入商品价格', trigger: 'blur' }],
        goods_weight: [{ required: true, message: '请输入商品重量', trigger: 'blur' }],
        goods_number: [{ required: true, message: '请输入商品数量', trigger: 'blur' }],
        goods_cat: [{ required: true, message: '请选择商品分类', trigger: 'blur' }],

      },

      // 商品列表数据
      goodsLIst: [],
      // 级联选择器绑定数据
      goodsItem: {
        expandTrigger: 'hover',
        label: 'cat_name',
        value: 'cat_id',
        children: 'children',
      },
      // 动态参数列表数据
      cateList: [],
      // 静态属性参数列表
      onlyParamsLIst: [],
      // 上传图片路径
      uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      // 请求头部信息
      objectTocken: { Authorization: window.sessionStorage.getItem('tocken') },
      // 图片预览对话框属性
      dialogVisible: false,
      // 预览图片地址
      previewURl: '',

    }
  },
  created() {
    this.getGoodsLiist()
  },
  methods: {
    // 获取商品列表数据
    async getGoodsLiist() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) return this.$message.error('获取商品列表数据失败')
      this.goodsLIst = res.data
    },
    // 级联选择器事件
    handleChange() {
      console.log(this.addForm.goods_cat);
      console.log(this.addForm.goods_cat.length);
      // 如果级联选择列表不等3 说明不是三级
      if (this.addForm.goods_cat.length !== 3) {
        // 清空
        this.addForm.goods_cat = []
        return
      }
    },
    // 级联选择器 选中项切换，会触发这个函数
    beforeTabLeave(activeName, oldactiveName) {
      // console.log(activeName);
      // console.log(oldactiveName);
      // return false
      if (this.addForm.goods_cat.length !== 3 && oldactiveName == 0) {
        this.$message.error('请选择商品分类!')
        return false
      }
    },

    // 切换tab标签触发的函数
    async tabClicked() {
      // 打印当前激活的页面值
      console.log(this.defaultActive);

      // 如果当前激活的标签值等于 1 说明进入商品参数页面
      if (this.defaultActive === '1') {
        // 发送请求获取商品数据
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`,
          {
            params: { sel: 'many' }
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('获取商品参数列表失败')
        }
        console.log(res.data);
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.cateList = res.data
        console.log(this.cateList);
      } else if (this.defaultActive === '2') {
        // 如果 defaultActive === '2' 进入商品属性页面发送请求获取静态属性值
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`,
          { params: { sel: 'only' } })
        if (res.meta.status !== 200) { return this.$message.error('获取静态属性参数列表失败') }
        console.log(res.data);
        this.onlyParamsLIst = res.data
        console.log(this.onlyParamsLIst);
      } else if (this.defaultActive === '3') {
        console.log(123456);
      }
    },
    // 处理图片预览
    handlePreview(file) {
      console.log(file);
      // 保存图片路径
      this.previewURl = file.response.data.url
      this.dialogVisible = true

    },
    // 删除图片
    handleRemove(file) {
      console.log(file)
      // 获取到要删除的地址
      const removeFile = file.response.data.tmp_path
      // 查到地址在对象中的索引
      const i = this.addForm.pics.findIndex((x) => { x.pic === removeFile })
      // 通过索引方式删除
      this.addForm.pics.splice(i, 1)
      console.log(this.addForm);
    },
    // 图片上传成功以后将图片地址保存下来
    onSuccessUplod(response) {
      console.log(response);
      const picurl = { pic: response.data.tmp_path }
      this.addForm.pics.push(picurl)
      console.log(this.addForm);
    },
    // 富文本添加商品按钮
    addCate() {
      console.log(this.addForm);
      // 对表单进行预验证
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return this.$message.error('请填写所有表单项')
        // 执行添加业务逻辑
        // 先把参数进项深拷贝
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // 动态参数
        this.cateList.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')

          }
          this.addForm.attrs.push(newInfo)
        })
        // 静态属性
        this.onlyParamsLIst.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals

          }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        console.log(form);

        // 发送添加商品请求
        const { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) {
          return this.$message.error('添加商品失败')
        }
        this.$message.success('添加商品成功')
        this.$router.push('/goods')
      })
    }

  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style lang="less" scoped>
.el-checkbox-group {
  display: inline;
  margin: 0 10px 0 0;
}
.previewImg {
  width: 100%;
}
.addgoods {
  margin-top: 10px;
}
</style>